Have tried every thing proposed, all uploads on this computer stops at 16 kb.
What on earth are we looking for at google.com and google.fi

That's BOINC's check for whether the host has an internet connection, done when a project contact fails. It can be turned off with a <dont_contact_ref_site>1</dont_contact_ref_site> option in a cc_config.xml file.

...
Well I have no ideas on how to reach full uploads, has any one else.

The 16K appears to be because that's the receive buffer size for the upload server, so that much gets sent without waiting for acknowledgement. Normally the ack would come back fairly quickly so your host could send the rest of the upload. But something is going wrong at that stage, and the debug log messages you've posted so far haven't caught that part.

Nothing unexpected, just all the contacts which involved sending more than one packet failed to get a response and timed out. But the request for Notices and the initial short POSTs for uploads worked OK.

Your other host isn't having any difficulty, is it on the same internet connection? If so, you might consider things like swapping cables or ports on the router.

Another possibility would be trying to use a proxy, others have needed to do so in order to get reliable communication sometimes and may be able to suggest one that is good.

transient HTTP error
How can this be fixed? I've deleted all BOINC and related programs several times with REVO, reinstalled different Versions of boinc and still end up with 'exited with zero status but no 'finished' file'
If this happens repeatedly you may need to reset the project. I've done this many times over a couple months. What's going on?
I think I'll just stop wasting my time and abandon BOINC until it's fixed.

I have the same issues for some projects (not all).
Resetting the project gives 1 success, but after that the same http errors.
Creating a cc_config.xml file does not work

What doen't work, creating a cc_config.xml file or the effect of it's
use?
What's your ISP and which MODEM/ROUTER are you using?
I'm using KPN/Planet Technologies and a Z.T.E. Corp (China) K.P.N Experia Box
ZVX 10 H220N, 4 port LAN (1 FOR Digital TV) and B/G/N Wireless (WiFi)
(As everyone out there can see ;-) )

Noticed another time consuming activity, logging through a cc_config option
writing ~10 lines per second for each option chosen in this cc_config!?

Could this lead to unnecessary CPU cycles used, or even interfere with the
SETI/Whatever-Data computation?